• Title/Summary/Keyword: 네트워크 관리 서비스

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Design and Implementation of Distributed Visualization Server for Real-time Visualization of Massive Dataset (거대 데이터의 실시간 가시화를 위한 분산 가시화 서버의 설계 및 구현)

  • Lee, Joong-Youn;Kim, MinAh;Hur, Youngju
    • Annual Conference of KIPS
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    • 2011.11a
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    • pp.467-470
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    • 2011
  • 일반 PC의 메인 메모리에 올릴 수 없는 거대 용량의 데이터의 경우 가시화를 통한 해석을 수행하는데 어려움이 많다. 본 논문에서는 이러한 거대 용량의 데이터를 실시간으로 처리하기 위한 분산 환경에서의 가시화 서버의 설계를 제안한다. 본 논문에서 제안하는 가시화 서버는 가시화 관리자, 네트워크 관리자, 데이터 관리자로 구분되며 이들 관리자를 통해 복수의 사용자에 대한 가시화 서비스 제공, 거대 데이터의 실시간 동적 데이터 분할 및 할당 및 실시간 가시화를 지원한다.

A Low Latency Handoff Scheme with Lossless Remote Subscription for Real-time Multimedia Communications in Mobile IP Environments (모바일 IP환경에서의 실시간 멀티미디어 통신을 위한 무손실 원격지 가입 저 지연 핸드오프)

  • Kim Ho-cheal;Kim Young-tak
    • Journal of KIISE:Information Networking
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    • v.31 no.6
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    • pp.620-632
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    • 2004
  • IP is not suitable for mobile nodes by network-based routing because mobile nodes are dynamically change their network attachment point. Mobile-IP is an IETF standard providing continuous access to the Internet for mobile nodes, but it has the triangle routing problem. Also it has a performance degradation problem by massive packet loss during layer 3 handoff of mobile nodes. Especially, two IETF multicast support schemes for Mobile-IP do not guarantee the quality of realtime multimedia services because they have several problems such as long routing path, packet duplication(hi-directional tunneling) and massive packet loss(remote subscription). In this paper, we propose a lossless remote subscription scheme that guarantees the quality of realtime multimedia services over Mobile-IP. From the result of simulation, we verified that the proposed scheme in this paper can reduce the delay time of remote subscription by the effect of the low latency handoff scheme that is extended to apply to the multicast group management and it requires only 0.58% buffer spaces of the previously proposed lossless remote subscription scheme.

K-Defense Cloud Computing System Design through Cloud Modeling and Analysis of Social Network Service Application (소셜 네트워크 서비스 어플리케이션의 클라우드 모델링 및 분석을 통한 국방 클라우드 컴퓨탱 시스템 설계)

  • Lee, Sung-Tae;Ryou, Hwang-Bin
    • Convergence Security Journal
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    • v.13 no.1
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    • pp.37-43
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    • 2013
  • In 2010, the Ministry of National Defense decided to build a MegaCenter including the cloud computing technology by 2014, as part of the '2012 Information Service Plan', which is now underway. The Cloud computing system environment should be designed applying cloud computing technology and policy for an efficient infrastructure that many IT resources are available in the data center as a concentrated form. That is, the system should be designed in such a way that clouding services will be efficiently provided to meet the needs of users and there will not be unnecessary waste of resources. However, in order to build an optimal system, it should be possible to predict the service performance and the resource availability at the initial phase of system design. In this paper, using the CloudAnalyst simulator to predict availability of the K-defence cloud computing system service, conducts cloud modeling and analysis of the 'Facebook', one of the most famous social network service applications with most users in the world. An Optimal K-Defense cloud computing design model is proposed through simulation results.

Autonomous Ad hoc Network Construction Method for Scalable Media Streaming Between Mobile Smart Devices (모바일 스마트 기기들 간의 확장성 있는 미디어 스트리밍을 위한 자율적인 Ad hoc 네트워크 형성 기법)

  • Kwon, Dongwoo;Je, Huigwang;Kim, Hyeonwoo;Ju, Hongtaek
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.40 no.3
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    • pp.516-528
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    • 2015
  • In this paper, we propose mobile ad hoc network configuration and its autonomous network construction method for efficiency and scalability of media streaming for mobile smart devices. To provide scalable network configuration for streaming traffic distribution, an IEEE 802.11 infrastructure network and ad hoc networks are hierarchically built. The proposed method autonomously configures a hierarchical streaming network by competition based on performance and states of devices and the wireless network, not depending on any specific nodes. Finally, we conduct performance measurement for the proposed configuration and analyze the experimental result.

A Cluster-Header Selecting Method for more Secure and Energy-Efficient in Wireless Sensor Network (무선 센서 네트워크에서 안전하고 에너지 효율적인 클러스터 헤더 선출 기법)

  • Kim, Jin-Mook;Lee, Pung-Ho;Ryou, Hwang-Bin
    • Convergence Security Journal
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    • v.7 no.2
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    • pp.107-118
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    • 2007
  • Distributed wireless sensor network in various environment have characteristic that is surveillance of environment-element and offering usefully military information but there is shortcoming that have some secure risks. Therefore secure service must be required for this sensor network safety. More safe and effective techniques of node administration are required for safe communication between each node. This paper proposes effective cluster-header and clustering techniques in suitable administration techniques of group-key on sensor network. In this paper, first each node transmit residual electric power and authentication message to BS (Base-Station). BS reflects "Validity Authentication Rate" and residual electric power. And it selects node that is more than these regularity values by cluster header. After BS broadcasts information about cluster header in safety and it transmits making a list of information about cluster member node to cluster header. Also, Every rounds it reflects and accumulates "Validity Authentication Rate" of former round. Finally, BS can select more secure cluster header.

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SePH: Seamless Proxy-based Handoff Scheme in IP-based Heterogeneous Mobile Networks (이기종의 모바일 IP 네트워크에서 끊김없는 프록시 기반의 핸드오프 기법)

  • Lee, Seung-Hyun;Shin, Dong-Ryeol;Jeong, Jong-Pil
    • The KIPS Transactions:PartC
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    • v.19C no.1
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    • pp.71-82
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    • 2012
  • In Next Generation Wireless Networks (NGWN), lots of information, such as voice and video data, will be used in All-IP networks. It is important note that seamless service for users and handoff between heterogeneous networks must be taken into account in such environments. Therefore, in this paper, we propose a SePH(Seamless Proxy based Handoff) using PMIPv6-based proxy model which is enable to improve the performance of handoff in NGWN. The SePH can efficiently support seamless and IP-based mobility by reducing the search process. The performance results show that our proposed scheme outperforms in terms of QoS (Quality of Service) such as throughput, handoff latency, packet loss, and signaling overhead comparing to the existing schemes.

Geographic and Energy Aware Geocasting in Ad-Hoc Networks (Ad-Hoc 네트워크에서 위치와 에너지를 고려한 지오캐스팅 알고리즘)

  • Lee Ju-Young
    • Journal of Internet Computing and Services
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    • v.5 no.2
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    • pp.75-84
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    • 2004
  • Geocasting, a variant of the conventional multicasting problem, is one of communication type in which the data packets are delivered to a group of all nodes within a specified geographical region (i.e., the geocasting region) and is called location-based multicasting(LBM)(l). An Ad-hoc network is a dynamically reconfigurable and temporary wireless network where all mobile devices using batteries as energy resources cooperatively maintain network connectivity without central administration or the assistance of base stations. Consequently, the technique to efficiently consume the limited amounts of energy resources is an important problem so that the system lifetime is maximized. In this paper, we propose a LBPA(Location-Based Power Aware) geocasting algorithm that selects energy-aware neighbor to route a packet towards the target region In Ad-hoc network environments. The method Is such that the energy consumption is balanced among the nodes in proportion to their energy reserves. Through the simulations, the proposed LBPA algorithm shows better results, that is, as good as 40% on the average over the conventional LBM algorithm in terms of the network lifetime.

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Smart Railway Communication Network Structure (스마트 철도 통신 네트워크 구조)

  • Kim, Young-dong;Kim, Jongki;Lee, Sanghak;Park, Eunkyung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.10a
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    • pp.357-359
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    • 2021
  • Railway system as a mass transportation is under progress to smart railway system beyond high speed and automation era. Communication network technology including 5G-R(5th Generation - Railway) mobile communication technology and information convergence technology of Big Data, Deep Learnig, AI(Artificial Intelliegnce) and Block Chain have to be used for implementation and operation of this smart railway system. In this paper, a communication network structure is suggested for this smart railway system. This suggested smart railway commnuication network structure is composed with layered structure of plane unit for safety operation of high speed railway, railway system management and customer services, and also have some complexed function of each plane. Results of this study can be used for smart railway communication network implementation, operation and managements, development of railway communication standards.

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A study on the research trends of records management in the UK through articles published in Archives and Records (Archives and Records 학술지 수록 논문을 통한 영국 기록관리학 연구 동향 분석)

  • Hyunjung Kim
    • Journal of Korean Society of Archives and Records Management
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    • v.23 no.3
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    • pp.63-87
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    • 2023
  • The study aims to investigate research trends in the UK records management field and compare the results with domestic research by analyzing research articles published in Archives and Records for the UK's research trends and The Korean Journal of Archival Studies (KJAS) for domestic ones. The study analyzed 318 articles published in KJAS and 142 articles published in Archives and Records since 2013, when the journal changed its title from Journal of the Society of Archivists, to investigate the distribution of authors, including the ratio of coauthorship and authors' affiliations. A set of 1,251 unique terms were extracted from KJAS, and 508 unique terms were extracted from Archives and Records for keyword co-occurrence network analyses. The result shows that the main research topics for KJAS include studies on (1) records management in general, such as archives, records, records management, and archival information service, (2) public records management, (3) personal or private records management, and (4) the techniques for records management, such as archival appraisal, selection, and disposition. In Archives and Records, (1) there are several case studies related to community and local archives, and (2) studies related to records management techniques, such as records description, appraisal, access, preservation, and service, have been performed continuously; furthermore, (3) studies on the digitization of oral history and audiovisual records are also one of the most researched areas.

Design and Implementation of Transport and Session Managers in a Multimedia Streaming Framework (멀티미디어 스트리밍 프레임워크에서 전송 및 세션 관리자의 설계 및 구현)

  • Lim, Eak-Jin;Lee, Sung-Young;Jeong, Chang-Yun
    • Journal of KIISE:Computing Practices and Letters
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    • v.7 no.1
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    • pp.24-37
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    • 2001
  • This paper deals with our experience for the design and implementation of Transport and Session managers in the Integrated Streaming Service Architecture (IS SA) that was developed by the authors. The ISSA is a streaming framework that allows to develop integrated multimedia streaming applications such as VOD system in unicast/multicast and real-time broadcastOive-cast). It also facilities standard real-time transport protocols such as RTp(Real-Time Transport Protocol)/RTCP(Real-time Control Protocol) and RTSP(Real-Time Streaming ProtocoD that allows to user openness. The ISSA supports diverse media fonnats and is independent from underlying networks and operating systems, and compatible with the global real-time multimedia database system (BeeHive) so that streaming media are efficiently retrieved, stored, and serviced. The role of the Transport Manager is to do packetization and depacketization for the different types of multimedia data and delivers the packetized media data in real-time. The Transport Manager uses RTP protocol. The role of the Session Manager is to establish and control the media channel by using RTSP protocol and to deliver the database transactions for the multimedia database by using RTTP(Real-Time Transaction Protocol) protocol. Both the Transport and Session Manager are doing their functions through the network interface in the ISSA that allows developers to various network programming interfaces and provides flexibility to the system.

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